26 



at the top for the passage of the cirrhi. To this 

 club-shaped integument are attached five small 

 narrow distant testaceous valves two situated at the 

 sides of the aperture, one dorsal, the rest terminal. 

 C. VITTATA. Leach. Lam. 1. Reeve, t. 15. 

 LEPAS V. Wood. G. C. p. 69. t. 12. /. 2. 3. D.p. 

 33. LEPAS MEMBRANACEA. Lin; T. 11. t. 12. /. 2. 

 Turt. D.p. 73. Wood. G. C. p. 20. Somewhat 

 oblong, gradually sloping into the stalk, obliquely trun- 

 cate at top, fleshy, flattish, with five small white linear 

 testaceous valves, the two upper rather oblique, the two 

 lower with a strong hook-like process in the middle of 

 each projecting inwardly aud curving a little upwards 

 to the point; the back valve gibbous in the middle, 

 extending above to the termination of the upper pair, 

 where they meet and form a projecting angle and reach- 

 ing below nearly to the commencement of the stalk 

 which is as long as the body ; pale blue with three 

 broad dark blue stripes on each side. !.... Smaller 

 variety. Uniform daik horn-colored, the stalk not 

 sloping. Poole and Devon, on planks of wrecked 

 vessels. 



GENUS OTION. 



Pedunculated, entirely enveloped in a membranaceous 

 integument, which is ventricose above and sur- 

 mounted by two horn-like truncated tubes turning 



